Question

给出以下XML示例：

<Meters>
  <Meter>
    <Meter_ID>213</Meter_ID>
    <Reading1>74.00000</Reading1>
    <DateTime1>10/05/2011 09:00:18</DateTime1>
    <Reading2>73.00000</Reading2>
    <DateTime2>10/05/2011 09:15:18</DateTime2>
    <Reading3>70.00000</Reading3>
    <DateTime3>10/05/2011 09:30:18</DateTime3>
  </Meter>
  <Meter>
    <Meter_ID>69</Meter_ID>
    <Reading1>146.00000</Reading1>
    <DateTime1>10/05/2011 09:00:18</DateTime1>
    <Reading2>167.00000</Reading2>
    <DateTime2>10/05/2011 09:15:18</DateTime2>
    <Reading3>173.00000</Reading3>
    <DateTime3>10/05/2011 09:30:18</DateTime3>
  </Meter>
</Meters>

最紧凑的JSON格式是什么，假设最终结果是 - 对于每个Meter_ID - 获得3 ReadingN和DateTimeN对？

Answer 1

每个Meter对象具有不同数量的读取/日期时间对的数组：

[
    {
        "Meter_ID": 213,
        "Readings":[
            {"Reading1": 74,"DateTime1": "10/05/2011 09:00:18"},
            {"Reading2": 73,"DateTime2": "10/05/2011 09:15:18"},
            {"Reading3": 70,"DateTime3": "10/05/2011 09:30:18"}
        ]
    },
    {
        "Meter_ID": 69,
        "Readings":[
            {"Reading1": 146,"DateTime1": "10/05/2011 09:00:18"},
            {"Reading2": 167,"DateTime2": "10/05/2011 09:15:18"},
            {"Reading3": 173,"DateTime3": "10/05/2011 09:30:18"}
        ]
    }
]

读取/日期时间对的数量固定为每米对象3：

[
    {
        "Meter_ID": 213,
        "Reading1": 74,
        "DateTime1": "10/05/2011 09:00:18",
        "Reading2": 73,
        "DateTime2": "10/05/2011 09:15:18",
        "Reading3": 70,
        "DateTime3": "10/05/2011 09:30:18"
    },
    {
        "Meter_ID": 69,
        "Reading1": 146,
        "DateTime1": "10/05/2011 09:00:18",
        "Reading2": 167,
        "DateTime2": "10/05/2011 09:15:18",
        "Reading3": 173,
        "DateTime3": "10/05/2011 09:30:18"
    }
]

删除元素字段名称，只包括数据的键/值对...

每个Meter对象具有不同数量的读取/日期时间对数组的更紧凑形式：

[
    {
        "Meter_ID": 213,
        "Readings":[
            {"74": "10/05/2011 09:00:18"},
            {"73": "10/05/2011 09:15:18"},
            {"70": "10/05/2011 09:30:18"}
        ]
    },
    {
        "Meter_ID": 69,
        "Readings":[
            {"146": "10/05/2011 09:00:18"},
            {"167": "10/05/2011 09:15:18"},
            {"173": "10/05/2011 09:30:18"}
        ]
    }
]

更紧凑的形式，读数/日期时间对固定为每米3对象：

[
    {
        "Meter_ID": 213,
        "74": "10/05/2011 09:00:18",
        "73": "10/05/2011 09:15:18",
        "70": "10/05/2011 09:30:18"
    },
    {
        "Meter_ID": 69,
        "146": "10/05/2011 09:00:18",
        "167": "10/05/2011 09:15:18",
        "173": "10/05/2011 09:30:18"
    }
]

什么是这种特定XML的理想JSON格式

1 个答案: